Car-truck bolster



Patented Aug. `3, 1.926..

UNITED STATES Bowman n. TAYLOR., or-Nnw Your, N. Y.

CAB-TRUCK BOLSTEB. I

Application led February 5, 1925. Serial No. 6,915.

The invention relates to bolsters for rail` way car trucks and seeks toprovide a bolster of strong construction and which is adapted for usewith the improved car truck set l forth in an application vfor LettersPatent filed in the United States Patent Oilice May j 16, 1924, SerialNo. 713, 675. The invention consists in the features of improvementhereinafter set forth, illustrated in the preferred form in theaccomp-anying drawing `and more particularly pointed out in the ap'-pended claims. 'Y

In the drawings: Fig. 1 is a side elevation of the truck with theimproved bolster applied thereto and shown in end elevation.

Fig. 2 is a view of thebolster partly in plan and partly in horizontalsection on the line 2 2 of Fig. 3.

Fig. 3 is a view of the same partly in side elevation and partly invertical section on the line 3 3 of Fig. 2.

As s'et forth in the application for Letters Patent above noted and asillustrated in Fig. 1, the car truck sidevframes a are provided withenlarged central portions having circular bearing openings ofconsiderable size within which carrier rings b are journaled.y

The rings are interlocked with the side frames by means oi keys 10 topermit the limited rocking movement of the side frames in verticalplanes and a truck 'bolster c and spring plank d interlock with thecarrier rings to connect the opposite sides of thea truck. For thispurpose, each carrier ring is provided with a'bolster opening havingcolumns 11 at opposite sides thereof and a supporting sill 12 at itslower end. The end of the spring plank d rests on the sill 12 andinterlocks therewith as by means of a depending stud 13 on theplankengaging a socket in the sill. The u per portions of the columnsare providedj with'inwardly projecting lugs or guides 14 whichco-operate in the usual manner with column guidesor lugs 15 ontheends'of the vbolster and the yu pfper ends .of the lugs'14 merge intothe arch-shapedportion 16 of the ring at the upper end of the bolsteropening. A set ofV springs e is interposed between the ends of the sprinplank and bolster, andif desired, the set o? springs can be connectedtogether by suitable cap plates. vIn assembling the parts, the end ofthebolster is first lnserted in the lower portion of the bolster openingand is then raised to -interlock/themcolumn guide lugs 14: and 15. Then,by inserting the spring plank and the set of springs, the bol-- ster andspring plank will be maintained in interlocked relation with the sideframe.

The iilnlgiroved'truck bolster comprises an upper compression member.17, a lower tenf 'sion member 18, and intermediate stiftening sidemembers 19 arranged in vertical planes. In the form shown, these membersconstitute respectively the top, bottom, andside walls ot' an integralhollow casting. But, if desired, these parts may be formed of two ormore pressed steel sections. To permit sulicient play' in the bolsteroperiings of the carrier rings andn ample space for the springs withoutunduly increasing the sizeof these-openings and of the rings, f theupper walls of these openings are arched as described and the endportions of the to wall or compression member 17 of the bo ster arecorrespondingly archedin cross-section. PAlso, for this purpose, the endortions ofthe bolster` which engage the sprmgs are considerably reducedin height andthe tension member or bottom wall 18- has portions,inclined upwardly from the central portion of the bolster, that mergeinto and terminate in substantially horizontal sprinengaging portions orseats 20.l To rovi a bolster of proper strength notwit standing thereduction in height at its ends, the

top wall or compression member' 17 is arched in section from the ends ofthe bolster nearl to the central bearing portion 21 thereo and theconvexty of this arch gradually increases from the central portion -ofthe bol-- ster to itsends. vThat is to say, adj aceut the centralbearing portion 21 thetop wall is substantially latand each end portionarranged within the carrier ring b conforms substantially to thecurvature ofthe arched portion 16 at the upper end of the bolsteropening. But between` these points there is no break or offset in thecross-section of th top -Wall or compression member of the bo ster.

Itis however provided ad'acent its ends, in

the form shown, with thic ened portions'22 havin flat upper surfaces'for supporting suitab e side earings.- Also, and stiir'en the bolster,the side Walls 19 are to strengthen extended below the spring seats' 20and the E inclined portions of t ber or bottom wall 18, to form stl'emngflanges 23 that are preferably connectedatv points adjacent the inner-ends of the spring y seats by transverse anges 24. Vertically e lowertersion 'memdisposed stifening parts or ribs 25 are also interposedbetween the. sprin seats20 and. the arched end portions of t e top wallof. the bolster. The central portion of the bolstermay be made of anysuitable or usual construction. In the form shown, the central portionsof the-upper and lower members or walls are connectedsb 26 that arestrengthened y bracing' ribs 27.

Changes may be made in the details sei; forth without departure from thescope of the invention as defined in the claims.

I claim as myinvention:

1. A car-truck bolster having top, bottom and side walls, the ends ofthe top wall being arched and the end portions of the bottom wallforming spring seats above the lower edges of* said side lwalls, and thebol- .ster having stitfening parts between said arched ends and saidspring seats, substanti-l ally as described. 2. A car-truck andcomprising top, bottom and side walls, the ends of the top wall beingarched and the ends of the bottom wall forming spring seats, and thebolster having st'ening ribs or anges above andbelow the spring seats,substantially as described.

3; A car-truck bolster having contracted ends and comprisingi a Atopwall having arched end portions, a bdtto'm wallinclined l upwardly fromthe center of the bolster and n ter of the bolster and terminatin inspring seats, and the lbolster having sti ening-ribs between Asaid seatsand the 'arched ends of the top wall and de riding stienin anges at th'eside edges-o the seats and o the 1n.

clined portions oi the bottom wall, substantially as described.

5. A ear truckbolster comprising atop o bolster having an enlargedvcentral portion -andcontracted end portions,

wall -having `a flattened central portion -merging gradually into anarched section Athat'gradually increases in convexity from vthe centerto' the bolster ends, and substantia'll continuous sti'ening side Wallsdepen ino' 6. A. car-truck bolster comprising av top merging gradnallyinto arched end portions that increase in convexity from theA centralportion thereof toits ends, depending side walls, and a bottom wallhaving portions 'upwardly inclined from the central portion o thebolster and terminating'in horizontal spring seats, substantially asdescribed.

7. car-truck bolster comprising an upper compression member havinAarched end portions, stiii'ening side mem ers, and @a lower tensionmember having portions inclined upwardly from 'the central portion ofthe bolster 'and terminating in s rin seats disposed above the loweredges o sai side members, substantially as described.

8. A car-truckbolster having contracted end portions and comprising an uuper compression member having arche ends, a lower tension memberterminating -in spring seats, and vertically' disposed stifening'members between said compression and tension members and, dependingbelow said seats, substantially as described.

wall having an arched section that is fiattened adjacent the centralportion of. the

-bolster, gradually! increases in convexity from the center to thebolster ends and is provided with thickened portions adjacent its endsforming side bearing seats and stiiening 'ribs or4 flanges dependingfrom said tolp 1wall, substantially as described. j 10. car-truckbolster havingA 'an enlarged central portion and contracted ends ancomprising an upper compression member having arched ends, fa lowertension member terminating in' flat, horizontalf s ring seats, vertical`side members and additional 'vertically disposed stiening membersbetween the central and end portions of` said compression and tensionmembers.

HOWARD i). Tarma 9. A car-truck bolster comprising a top4 from the edgesof the top wall, sub# stantial-ly as described. vertical portions lWall.having 4a attened central portion

